Effect of moisture on the thermal performance of exterior walls in the tropical islands of the South China Sea

被引：9

作者：

Li, Fuxiang ^{[1
]}

Li, Qiong ^{[1
]}

Meng, Qinglin ^{[1
]}

Liu, Jingyi ^{[1
]}

Mao, Huijun ^{[1
]}

Xie, Jingchao ^{[2
]}

Liu, Jiaping ^{[2
,3
]}

机构：

[1] South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510640, Peoples R China

[2] Beijing Univ Technol, Beijing Key Lab Green Built Environm & Energy Eff, Beijing 100124, Peoples R China

[3] Xian Univ Architecture & Technol, State Key Lab Green Bldg Western China, Xian 710055, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2021年 / 186卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Coupled heat and moisture transfer; Thermal performance; Extremely hot and humid climate; Conduction load; Dynamic thermal response; BUILDING-MATERIALS; HEAT; THICKNESS; IMPACT;

D O I：

10.1016/j.applthermaleng.2020.116505

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Accurate evaluation of the moisture effect on the thermal performance of building envelopes is essential to facilitate energy-saving building design in hot and humid climate areas. However, in extremely hot and humid climate areas, the coupled effect between the heat and moisture transfer is mostly neglected and a method to evaluate the moisture effect on the thermal performance has never been proposed. Thus, in this paper, a model is developed to simulate the coupled heat and moisture transfer inside an exterior wall subjected to extremely hot and humid climate. This model is validated using three benchmark tests and shows high accuracy. Based on the model, the effect of the moisture on the thermal performance of exterior walls in the tropical islands is firstly investigated quantitatively. The results show that moisture can substantially affect the thermal performance of an exterior wall. Neglecting the moisture effect, the total load is underestimated by 6.04-7.33%. Considering the moisture effect, the decrement factor is improved from 26.27-38.28 to 79.40-114.41 and the time lag is prolonged by 71-79 min. Finally, to clarify the spatiotemporal dynamic pattern of the moisture effect, a comparison between the four tropical islands and the continental city is performed.

引用

页数：15

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